CVE-2026-104937 CVE-2026-104937
Stored XSS in Shopware allows attackers to steal admin tokens and execute arbitrary code via malicious plugin uploads.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-104937?
CVE-2026-104937 is a high-severity cross-site scripting vulnerability in Shopware, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Shopware version 6.7 allows the upload of attacker‑controlled HTML files and serves them as text/html without effective security headers, enabling stored cross-site scripting (XSS). When a malicious uploaded file containing an embedded JavaScript payload is viewed by an administrator, the attacker can access and exfiltrate the administrator's authentication token. The compromised token enables unauthorized access to the Shopware Administration API. If the affected administrator account possesses extension‑management privileges, an attacker can upload, install, and activate malicious plugins to achieve arbitrary PHP code execution on the underlying OS with the privileges of the Shopware process.
Weakness: CWE-79
Which versions are affected by CVE-2026-104937?
How do I fix CVE-2026-104937?
No fix has been published for CVE-2026-104937 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-104937 being exploited?
There is no known exploitation of CVE-2026-104937 in the wild and no public exploit code.
Sources
Also known as GHSA-pfh5-g6h6-v95h.